mirror of
https://github.com/varun-r-mallya/sysprof.git
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1708ad1b48
The big thing going on here is that we are going to split up the libraries a bit better, and remove GObject from the capture library. The libsysprof library will bring in the capture library statically, so we can export the symbols we want. Eventually, we will bump the version to sysprof-3, but not yet.
196 lines
3.6 KiB
C
196 lines
3.6 KiB
C
/* sp-capture-util.c
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*
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* Copyright 2019 Christian Hergert <chergert@redhat.com>
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*
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* This file is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This file is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include <errno.h>
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#include <glib.h>
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#ifdef G_OS_WIN32
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# include <process.h>
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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#endif
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#include "sp-capture-util-private.h"
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#ifdef G_OS_WIN32
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static G_LOCK_DEFINE (_sp_io_sync);
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#endif
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size_t
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_sp_getpagesize (void)
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{
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static size_t pgsz = 0;
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if G_UNLIKELY (pgsz == 0)
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{
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#ifdef G_OS_WIN32
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SYSTEM_INFO system_info;
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GetSystemInfo (&system_info);
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pgsz = system_info.dwPageSize;
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#else
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pgsz = getpagesize ();
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#endif
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}
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return pgsz;
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}
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ssize_t
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_sp_pread (int fd,
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void *buf,
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size_t count,
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off_t offset)
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{
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#ifdef G_OS_WIN32
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ssize_t ret = -1;
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G_LOCK (_sp_io_sync);
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errno = 0;
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if (lseek (fd, offset, SEEK_SET) != -1)
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ret = read (fd, buf, count);
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G_UNLOCK (_sp_io_sync);
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return ret;
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#else
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errno = 0;
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return pread (fd, buf, count, offset);
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#endif
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}
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ssize_t
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_sp_pwrite (int fd,
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const void *buf,
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size_t count,
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off_t offset)
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{
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#ifdef G_OS_WIN32
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ssize_t ret = -1;
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G_LOCK (_sp_io_sync);
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errno = 0;
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if (lseek (fd, offset, SEEK_SET) != -1)
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ret = write (fd, buf, count);
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G_UNLOCK (_sp_io_sync);
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return ret;
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#else
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errno = 0;
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return pwrite (fd, buf, count, offset);
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#endif
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}
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ssize_t
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_sp_write (int fd,
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const void *buf,
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size_t count)
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{
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#ifdef G_OS_WIN32
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ssize_t ret = -1;
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G_LOCK (_sp_io_sync);
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errno = 0;
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ret = write (fd, buf, count);
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G_UNLOCK (_sp_io_sync);
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return ret;
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#else
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errno = 0;
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return write (fd, buf, count);
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#endif
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}
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gint32
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_sp_getpid (void)
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{
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#ifdef G_OS_WIN32
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return _getpid ();
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#else
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return getpid ();
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#endif
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}
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ssize_t
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_sp_sendfile (int out_fd,
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int in_fd,
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off_t *offset,
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size_t count)
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{
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ssize_t total = 0;
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off_t wpos = 0;
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off_t rpos = 0;
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errno = 0;
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if (offset != NULL && *offset > 0)
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wpos = rpos = *offset;
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while (count > 0)
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{
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unsigned char buf[4096*4];
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ssize_t n_written = 0;
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ssize_t n_read;
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off_t off = 0;
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size_t to_read;
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/* Try to page align */
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if ((rpos % 4096) != 0)
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to_read = 4096 - rpos;
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else
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to_read = sizeof buf;
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if (to_read > count)
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to_read = count;
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errno = 0;
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n_read = _sp_pread (in_fd, buf, to_read, rpos);
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if (n_read <= 0)
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return -1;
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g_assert (count >= n_read);
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count -= n_read;
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rpos += n_read;
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while (wpos < rpos)
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{
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g_assert (off < sizeof buf);
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errno = 0;
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n_written = write (out_fd, &buf[off], rpos - wpos);
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if (n_written <= 0)
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return -1;
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wpos += n_written;
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off += n_written;
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total += n_written;
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}
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}
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g_assert (count == 0);
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if (offset != NULL)
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*offset = rpos;
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errno = 0;
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return total;
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}
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